/*!	 lyr_freetype.h
**	 Header file for implementation of the "Text" layer
**
**	Copyright (c) 2002-2005 Robert B. Quattlebaum Jr., Adrian Bentley
**	Copyright (c) 2007, 2008 Chris Moore
**	Copyright (c) 2012-2013 Carlos López
**
**	This package is free software; you can redistribute it and/or
**	modify it under the terms of the GNU General Public License as
**	published by the Free Software Foundation; either version 2 of
**	the License, or (at your option) any later version.
**
**	This package is distributed in the hope that it will be useful,
**	but WITHOUT ANY WARRANTY; without even the implied warranty of
**	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
**	General Public License for more details.
**
** === N O T E S ===========================================================
**
** ========================================================================= */

#ifndef __SYNFIG_LYR_FREETYPE_H
#define __SYNFIG_LYR_FREETYPE_H

// #ifdef __APPLE__

#include <synfig/layers/layer_composite.h>
#include <synfig/vector.h>
#include <synfig/color.h>
#include <synfig/string.h>

#include <ft2build.h>
#include FT_FREETYPE_H
#include FT_GLYPH_H
#include <vector>

#include <synfig/string.h>
#include <synfig/time.h>
#include <synfig/context.h>
#include <synfig/paramdesc.h>
#include <synfig/renddesc.h>
#include <synfig/surface.h>
#include <synfig/value.h>
#include <synfig/valuenode.h>
#include <synfig/canvas.h>

#include <ETL/misc>

#ifdef USE_MAC_FT_FUNCS
#include <CoreServices/CoreServices.h>
#include FT_MAC_H
#endif

using namespace synfig;
using namespace std;
using namespace etl;

struct Glyph {
    FT_Glyph glyph;
    FT_Vector pos;
    // int width;
};
struct TextLine {
    int width;
    std::vector<Glyph> glyph_table;

    TextLine(): width(0) { }
    void clear_and_free();

    int actual_height()const
    {
        int height(0);

        std::vector<Glyph>::const_iterator iter;

        for (iter = glyph_table.begin(); iter != glyph_table.end(); ++iter) {
            FT_BBox   glyph_bbox;

            FT_Glyph_Get_CBox(iter->glyph, ft_glyph_bbox_subpixels, &glyph_bbox);

            if (glyph_bbox.yMax > height) {
                height = glyph_bbox.yMax;
            }
        }

        return height;
    }
};

class Layer_Freetype : public synfig::Layer_Composite, public synfig::Layer_NoDeform
{
    SYNFIG_LAYER_MODULE_EXT
private:
    // Parameter: (synfig::String) text of the layer;
    ValueBase param_text;
    // Parameter: (synfig::Color) color of the text;
    ValueBase param_color;
    // Parameter: (synfig::String) font family used in the text
    ValueBase param_family;
    // Parameter: (int) style used in the font
    ValueBase param_style;
    // Parameter: (int) weight used in the font
    ValueBase param_weight;
    // Parameter: (synfig::Real) horizontal spacing
    ValueBase param_compress;
    // Parameter: (synfig::Real) vertical spacing
    ValueBase param_vcompress;
    // Parameter: (synfig::Vector) size of the text
    ValueBase param_size;
    // Parameter: (synfig::Vector) text orientation
    ValueBase param_orient;
    // Parameter: (synfig::Point) text position
    ValueBase param_origin;
    // Parameter: (synfig::String) font used in the text
    ValueBase param_font;
    // Parameter: (bool)
    ValueBase param_use_kerning;
    // Parameter: (bool)
    ValueBase param_grid_fit;
    // Parameter: (bool) inverts the rendered text
    ValueBase param_invert;

    FT_Face face;

    bool old_version;
    bool needs_sync_;

    void sync();

    synfig::Color color_func(const synfig::Point &x, int quality = 10, synfig::ColorReal supersample = 0)const;

    mutable synfig::Mutex mutex;

public:
    Layer_Freetype();
    virtual ~Layer_Freetype();

    virtual void on_canvas_set();
    virtual bool set_param(const String & param, const synfig::ValueBase &value);
    virtual ValueBase get_param(const String & param)const;
    virtual Color get_color(Context context, const synfig::Point &pos)const;
    virtual bool accelerated_render(Context context, Surface *surface, int quality, const RendDesc &renddesc, ProgressCallback *cb)const;
    virtual bool accelerated_cairorender(Context context, cairo_t *cr, int quality, const RendDesc &renddesc, ProgressCallback *cb)const;

    virtual Vocab get_param_vocab()const;

    virtual bool set_version(const String &ver)
    {
        if (ver == "0.1") {
            old_version = true;
        }

        return true;
    }
    virtual void reset_version()
    {
        old_version = false;
    }

    virtual synfig::Rect get_bounding_rect()const;

private:
    void new_font(const synfig::String &family, int style = 0, int weight = 400);
    bool new_font_(const synfig::String &family, int style = 0, int weight = 400);
    bool new_face(const synfig::String &newfont);
};

extern FT_Library ft_library;

#endif